Assembly-tool



R. F. TRIMBLE.

ASSEMBLY TOOL.

AEPLICATION FILED Nov. 25. 1919.

x1 ,363,933. Patented Dem 28,1920.,

UNITED sTATEs PATENT OFFICE.

RUSSELL E. TRIMELE, or EmzARE'rH, NEW JERSEY, ASSIGNOR 'ro WESTERN ELEC- TRIC COMPANY. INCORPORATED, or NEW YoRx, N. Y., CORPORATION 0F NEW YoRx.'

ASSEMBLY-TOOL Specification of Letters '.Patent.

Patented Dec. 28, 1920.

Application filed November 25, 1919. Serial No. 340,548.

T o all whom z't 'may concern:

Be it known that I, RUSSELL F. TRIMBLE, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jerse have invented certain new and useful mprovements in Assembly- Tools, of which the following is a full, clear, concise, and exact description.

My present invention relates 4to special tools and machinery and to the assembling and mounting of audion plates in vacuum tubes, and it has for its object to provide an improved method of attaching the connecting wires to the plates and assembling them in the vacuum tube and a simple and convenient apparatus for assisting an operator in carrying out the method. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the L claims at the end of the specification.

In the drawings:

Figure 1 is a perspective View, partially broken away, of an apparatus constructed in accordance with and illustrating one embodiment of my invention, and

Fig. 2 is a perspective view partly broken away of an audion showing the finished plates assembled therein.

Similar reference ynumerals throughout the several views indicate the same parts.

In. Fig. 2, 1 indicates the base of the audion and 2 the vacuum tube or bulb inclosing the stem 3 upon .which the interior parts are supported. The plates are indicated at 4 on opposite sides of the grids 5 and the intermediate filament 6. yThese plates are parallel with each other and joined. by yokes or U-shaped connecting wires 7 that are themselves supported by arms 8 extending from the stem 3. It is with the connecting up of these plates that the present invention is concerned, it having heretofore been the practice to first form the Wires 7 into their U-shaped form and to then attach them to the plates.

In the practice of my present invention, I provide a jig embodying a base block 9 upon which may be placed electrically a flanged conductive holder 10, the channel or groove 11 of which may be relatively shallow. The plates 4 are slipped into opposite ends of this holder as shown in Fig. 1, so that they are alined and heldin the same plane with a degree of separation determiied by stop pins 12. Intermediate the latter and between the` proximate edges of the plate (which are to become the top edges in the assembly of Fig. 2) are a pair of spaced channeled members 13 that may consist of screws sunk in the holder with their heads protruding and their channels parallel and extending longitudinally of the lholder 10. `When the plates are in place the wires 7 are dropped into and held positioned by the members 13 so that their ends rest on the ends of the respective plates 4, as shown in Fig. 4, the wires having been previously cut to length but left straight.

. The base 9 and the holder 11 constitute one electrode of an electric spot-Welding apparatus, a terminal wire 14 being connected to the former by a binding post 15. Movable above the base and holder and into and out of contact with the workpieces is a welding point16 carried in a socket 17 with a spring 18 coiled in the receiving cavity back of the point to give-it a resilient Contact. A set screw 19 cooperating with a groove 2O in the shank of the point limits its movement and the other terminal wire 21 is connected directly to the point, as shown.

Vhen the plates and wires have been properly positioned in the jig, the point 16 is brought down successively on the ends of the wires andthey are welded to the plates. The connected plates are then removed and the wires bent into the yoke-shaped form of Fig. 2 in any suitable manner with the plates attached, and are then assembled on the stem 3.

What is claimed is:

1. A method of mounting plane surfaces which consists in disposing the surfaces in the same plane, attaching their connecting wires thereto before said wires are shaped, bending the wires to bring the surfaces into parallelism, and mounting the wires and surfaces together upon a support. y

2. A method of mounting" audion plates which consists in disposing the plates in the same plane, laying straight attaching wires thereon, welding the respective ends of the wires to the respective plates, bending the wires to bring the plates into parallelism, and mounting the wires and plates together upon the supporting stem.

3. A jig for assembling plane surfaces comprising a flanged holder adapted to position the surfaces in alinement in the same plane, and channeled members in the holder intermediate the surface positions adapted to receive and position connecting Wires with their ends resting on the respective surfaces..

4;. A jig for assembling and attachin audion plates comprising a flat langecgl holder adapted to position the plates in alinement in the same plane5 stop members controlling the degree of separation of the plates and headed screws sunk in the bed of the holder between the stop members, the channels of said screws being adapted to re- RUSSELL F. TRIMBLE. 

